Trystan Casey
Electric log truck scales are used in the forestry industry to weigh raw timber entering a facility or wood by-products exiting. Before use, they need to be installed and calibrated. Installation includes setting the scale, anchoring the scale, running cables, wiring the scale, setting up peripheral devices, and placing the scale into service. After installation, the scale should be inspected by the state's Department of Transportation to ensure accuracy and compliance with state standards.
| Characteristics | Values |
|---|---|
| Installation | Setting the scale, anchoring the scale, running all cabling, wiring the scale, setting up peripheral devices, calibrating the scale, and placing the scale into service |
| Anchoring | Adjusting scale modules to ensure alignment, using large breaker bars and interconnect bolts to ensure correct location, drilling anchor bolt holes, installing and tightening anchor bolts, centering and levelling the scale with approaches and end-walls |
| Calibration | Recalibration after relocation, inspection by the state's Department of Transportation |
| Relocation | Disconnect all electrical components, ensure electrical access for a sump pump (if no gravity drain for in-ground scales), choose a new location based on a survey of the property, perform a thorough inspection before relocation |
| Inspection | Regular inspections, including after relocation, to increase lifespan and ensure quality and accuracy |
| Cleaning | Clean scales after calibration |
| Product Examples | Centurion Truck Scale, AX200 Axle Scale, Workhorse Floor Scale, Maverick Portable Truck Scale, Eweigh Floor Scale, US-LD3131 "Little Drummer" Drum Scale |
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What You'll Learn
Setting the scale
Once you have prepared the foundation, it's time to set the scale modules onto it. This typically involves using a crane, loader, or other lifting equipment to offload the scale and place it onto the foundation. The ease of access to the foundation will determine how long this process takes. Make sure to use large breaker bars and interconnect bolts to ensure the modules are in the correct location and properly aligned.
After the scale modules are in place, they will need to be secured. This involves drilling anchor bolt holes in the foundation, installing and tightening the anchor bolts, and ensuring the scale is centred and level with the approaches and end-walls. At this stage, any checking or adjustment bolts will also be installed and set to the correct tolerances.
Depending on the brand and type of scale you have purchased, the wiring process may vary. For most electronic truck scales, each load cell's cable needs to be run to the junction box. Consult your scale's instructions or a professional for guidance on proper wiring procedures.
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Anchoring the scale
Firstly, ensure that the foundation is set and fully cured. This provides a stable base for the scale and ensures its accuracy and longevity. Once the foundation is ready, position the scale platform over it with precision. Use a crane, loader, or other lifting equipment to carefully place the scale modules onto the foundation. Ensure easy access to the foundation to simplify this process.
Next, adjust the scale modules to ensure they are aligned properly. Use large breaker bars and interconnect bolts to secure the modules in the correct location. Once aligned, place the scale onto base plates and load cells. At this stage, a scale technician will begin drilling anchor bolt holes in the foundation. They will then install and tighten anchor bolts to secure the scale. Ensure that the bolts are tightened to the manufacturer's specifications to achieve proper tension without damaging the platform or foundation.
Finally, after anchoring, ensure that the scale is centred and level with the approaches and end-walls. Install any checking or adjustment bolts and set them to the correct tolerances. This completes the anchoring process, providing a stable and secure foundation for accurate weight measurements.
Remember, anchoring is just one part of the installation process. Other important steps include running cabling, wiring the scale, setting up peripheral devices, calibrating the scale, and final placement. Each of these steps contributes to the overall functionality and accuracy of the electric log truck scale.
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Running cables
Firstly, ensure that the truck scale has been securely set on its foundation. This includes using a crane or other lifting equipment to place the scale modules onto the foundation. Once the scale is in position, it's time to start the cabling process.
The specific wiring and cabling requirements may vary depending on the brand and type of electric log truck scale you are installing. Refer to the product manual or consult a qualified technician to understand the exact cabling needs for your scale.
In general, for most electronic truck scales, each load cell's cable needs to be connected to the junction box. This involves running the cables from the load cells to the designated junction box, ensuring they are securely connected.
It is important to handle the cables with care to avoid any damage during the installation process. Proper cable management techniques should be employed, such as bundling or securing cables to prevent tangling or accidental disconnection.
After running the cables, the next step is to ensure that the scale is correctly calibrated. This process may involve configuring the scale's settings, conducting test measurements, and making any necessary adjustments to ensure accurate weight readings.
By carefully following the cabling instructions and seeking professional guidance when needed, you can ensure that your electric log truck scales are properly installed and ready for accurate and reliable weight measurements.
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Wiring the scale
It is important to consult the instructions provided by the manufacturer of the specific scale model. These instructions will outline the exact wiring diagram and connection points for the scale's electronics. Following these instructions is crucial to ensure accurate measurements and the proper functioning of the scale.
During the wiring process, it is essential to ensure that all electrical connections are secure and insulated to prevent any potential short circuits or electrical issues. This includes properly routing and securing the cables to avoid any damage or interference with the scale's mechanical components.
In some cases, additional peripheral devices may need to be connected to the scale, such as a weight indicator or a data logging system. These devices will require their own wiring and configuration, which should be outlined in the manufacturer's instructions. Ensuring that all connections are made correctly is vital for the overall functionality and accuracy of the scale.
Lastly, once the wiring is complete, it is important to test the scale to ensure it is functioning properly. This may involve conducting a series of test measurements and verifying that the scale provides accurate and consistent readings. Any issues or discrepancies should be addressed promptly, and adjustments should be made as necessary to ensure the scale's accuracy and reliability.
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Calibrating the scale
Calibrating electric log truck scales is a critical process that ensures operational accuracy, compliance, and safety. Here is a detailed guide on how to calibrate your electric log truck scales:
Zero Adjustment:
The first step is to bring the scale to its "zero" or "tare" state. This is done to ensure that the scale reads zero when no load is present. If the scale does not display zero, adjustments will be required.
Load Cell Testing:
Load cells are essential components of truck scales, converting the weight of the vehicle into an electrical signal. During calibration, apply known weights to each load cell and verify that the scale's readings match the expected values. This process helps identify faulty cells that may need repair or replacement.
Corner Test:
Place a certified test weight at each corner of the scale platform to ensure that each load cell is functioning correctly and that the weight is evenly distributed.
Adjustments:
If discrepancies are found during testing, adjustments are necessary. Modern truck scales often have digital calibration systems that allow for electronic adjustments. Older scales may require manual adjustments using mechanical mechanisms.
Final Verification:
After making adjustments, retest the scale to ensure it provides accurate readings. This involves repeating some or all of the tests mentioned above. Proper documentation of the calibration process is crucial, recording the tests performed, adjustments made, and final verified measurements.
Regular Calibration:
Establish a regular calibration schedule based on usage and manufacturer recommendations. High-traffic scales may require more frequent calibrations. Regular calibration helps mitigate the impact of external factors, ensuring accurate measurements and proper functioning.
Initial Certification:
When your truck scales are installed, ensure they are tested and certified for performance. This initial certification guarantees that everything is functioning correctly and considers factors such as gravity tolerance, scale location, and scale model.
Additional Tests:
There are several additional tests you can perform to ensure the accuracy of your truck scales, including the eccentricity test, repeatability test, and linearity test. The eccentricity test involves placing weights on different spots on the scale. The repeatability test requires adding and removing the same volume of weight multiple times to ensure consistency. The linearity test helps determine how calibration should be adjusted in case of errors.
Remember, accurate weight measurements are crucial for regulatory compliance, shipping cost calculations, preventing overloading, and ensuring fair trade practices.
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Frequently asked questions
The installation of electric log truck scales involves several components, including setting the scale, anchoring the scale, wiring the scale, calibrating the scale, and placing the scale into service. Before setting up the scale, ensure your foundation is ready. Then, use a crane or other lifting equipment to place the scale modules onto the foundation. Adjust the modules to ensure they are aligned and in the correct location. Secure the scale to the foundation by drilling anchor bolt holes and installing anchor bolts. Finally, connect the wiring and set up any peripheral devices.
Before moving your electric log truck scales, ensure that all electrical components are disconnected and unplugged. Make it clear that the scales are closed to truckers to avoid any roadside maneuvering. Have your new property surveyed to determine the best location for your scales. Perform a thorough inspection of your scales to ensure they are in good condition before transport.
After moving your electric log truck scales, have them inspected and certified by your state's Department of Transportation to ensure accurate measurements and compliance with state standards. Recalibrate your scales and perform regular maintenance, including cleaning and inspections, to increase their lifespan and maintain accuracy.
Safety is the top priority when moving electric log truck scales. Ensure that all electrical components are safely disconnected and unplugged before transport. Make it obvious that the scales are closed to truckers to prevent any potential hazards or maneuvering on the roadside. Only use reputable and trustworthy transport services to ensure a smooth and safe move.
